Climatological Report (Seasonal)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
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143 CXUS51 KGYX 050048 CCA CLSPWM PWMCLSPWM 000 TTAA00 GYX 012257 CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 648 PM EDT FRI JUN 04 2021 ................................... ...THE PORTLAND ME CLIMATE SUMMARY FOR THE SPRING SEASON, FROM 3/1/2021 TO 5/31/2021... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1941 TO 2021 (FOR TEMPERATURES) CLIMATE RECORD PERIOD: 1871 TO 2021 (FOR PRECIPITATION) CLIMATE RECORD PERIOD: 1882 TO 2021 (FOR SNOWFALL) WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 94 05/31/1987 LOW -21 03/04/1950 HIGHEST 88 05/26 85 3 86 05/28 LOWEST 7 03/02 6 1 16 03/01 AVG. MAXIMUM 55.3 53.5 1.8 54.4 AVG. MINIMUM 35.7 35.6 0.1 36.1 MEAN 45.5 44.5 1.0 45.3 DAYS MAX >= 90 0 0.4 -0.4 0 DAYS MAX <= 32 3 4.2 -1.2 0 DAYS MIN <= 32 28 37.2 -9.2 32 DAYS MIN <= 0 0 0.4 -0.4 0 PRECIPITATION (INCHES) RECORD MAXIMUM 22.55 1983 MINIMUM 4.23 1965 TOTALS 8.50 12.16 -3.66 10.79 DAILY AVG. 0.09 0.13 -0.04 0.12 DAYS >= .01 28 34.9 -6.9 30 DAYS >= .10 15 21.1 -6.1 20 DAYS >= .50 6 8.2 -2.2 8 DAYS >= 1.00 2 2.7 -0.7 3 GREATEST 24 HR. TOTAL 1.48 03/28 TO 03/29 SNOWFALL (INCHES) RECORDS TOTAL 61.5 1906 TOTALS 0.4 16.4 -16.0 9.1 SINCE 7/1 41.3 68.7 -27.4 66.0 SNOWDEPTH AVG. 0 DAYS >= TRACE 9 6.4 2.6 12 DAYS >= 1.0 0 3.5 -3.5 2 GREATEST SNOW DEPTH 3 03/01 24 HR TOTAL 0.3 DEGREE DAYS HEATING TOTAL 1788 1894 -106 1809 SINCE 7/1 6338 6705 -367 6389 COOLING TOTAL 16 11 5 18 SINCE 1/1 16 11 5 18 ................................................................ WIND (MPH) AVERAGE WIND SPEED 8.6 HIGHEST WIND SPEED/DIRECTION 40/300 DATE 03/02 HIGHEST GUST SPEED/DIRECTION 44/270 DATE 05/26 SKY COVER AVERAGE SKY COVER 0.51 AVERAGE RH (PERCENT) 65 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 2 HEAVY RAIN 4 RAIN 12 LIGHT RAIN 33 FREEZING RAIN 0 LT FREEZING RAIN 0 HEAVY SNOW 0 SNOW 1 LIGHT SNOW 6 FOG 25 FOG W/VIS <= 1/4 MILE 5 HAZE 4 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && SPRING BEGAN WITH A STRONG COLD FRONT WHICH BROUGHT COLD AND WINDY CONDITIONS. A STRETCH OF MILD WEATHER IN MID MARCH ALLOWED THE LAST OF THE WINTER SNOW DEPTH TO MELT BY THE MORNING OF MARCH 14. ANOTHER STRONG COLD FRONT BLEW THROUGH SHIFTING TEMPERATURES WELL BELOW FREEZING AGAIN WITH WINDS GUSTING TO 50 MPH. THIS WAS THE LAST INTENSE ARCTIC BLAST OF THE SEASON AND IT DIDN`T LAST LONG. MILD WEATHER RETURNED JUST A FEW DAYS LATER. SEVERAL STORM SYSTEMS BROUGHT RAIN AT THE END OF MARCH AND BEGINNING OF APRIL WITH MEASURABLE RAIN FALLING ON 6 OUT OF 8 DAYS. THE HEAVIEST WAS ON MARCH 28 WHEN NEARLY 1.5 INCHES WAS MEASURED. ANOTHER ROUND OF STRONG WIND OCCURRED BEHIND THIS STORM WITH GUSTS AS HIGH AS 53 MPH ON MARCH 28. THE WEATHER TURNED DRY AGAIN FOR THE FIRST TWO WEEKS OF APRIL WITH SOME MILD TEMPERATURES OBSERVED AS WELL. LOW PRESSURE TRACKING NEAR THE AREA BROUGHT RAIN AND WET SNOWFALL ON APRIL 16 WITH SOME MINOR ACCUMULATION. THIS WAS THE START OF ANOTHER RAINIER STRETCH OF WEATHER WHICH SAW FREQUENT FRONTAL SYSTEMS BRING ALTERNATING WARMER AND COOLER WEATHER AND OCCASIONAL RAINFALL. THIS LASTED INTO THE FIRST WEEK OF MAY BEFORE THINGS BEGAN TO DRY OUT YET AGAIN. THE LAST FREEZE OF THE SPRING WAS ON APRIL 22, A FEW DAYS EARLIER THAN NORMAL AND ALSO THE 8TH EARLIEST ON RECORD. PORTLAND SAW VERY LITTLE RAINFALL FOR ABOUT TWO WEEKS DURING THE MIDDLE OF MAY WITH TEMPERATURES GRADUALLY WARMING INTO THE 70S AND EVEN INTO THE 80S. THIS LASTED UNTIL A COLD FRONT CAME THROUGH LATE IN THE MONTH. THIS WAS ACCOMPANIED BY THUNDERSTORMS PRODUCING GUSTY WINDS ON MAY 28TH. MEMORIAL DAY WEEKEND WAS A COOL AND WET ONE WITH SEVERAL DAYS OF RAIN OBSERVED. THE AVERAGE TEMPERATURE WAS 45.5 DEGREES WHICH WAS 1.0 DEGREES ABOVE NORMAL AND THE 5TH WARMEST SPRING ON RECORD. THE WARMEST SPRING WAS IN 2010 WHEN THE AVERAGE TEMPERATURE WAS 48.9 DEGREES. THE COOLEST WAS 37.9 DEGREES IN 1956. THE FOLLOWING TABLE LISTS THE WARMEST SPRINGS ON RECORD AT PORTLAND. WARMEST AVERAGE TEMPERATURE IN SPRING (SINCE 1941)... RANK TEMP YEAR 1 48.8 2010 2 48.2 2012 3 47.0 1991 4 46.4 1998 5 45.5 2021 <=== 6 45.4 1981 7 45.3 2020 8 45.2 1942 9 45.1 2016 45.1 1945 THE LAST FREEZE OF THE SPRING OCCURRED ON APRIL 22. THIS WAS A FEW DAYS EARLIER THAN THE NORMAL LAST FREEZE OF APRIL 26 AND ALSO TIED AS THE 8TH EARLIEST LAST FREEZE ON RECORD. THE FOLLOWING TABLE LISTS THE EARLIEST LAST SPRING FREEZES ON RECORD AT PORTLAND. EARLIEST LAST FREEZE IN SPRING (SINCE 1941)... RANK DATE 1 APR 14, 1983 2 APR 15, 1973 APR 15, 1976 4 APR 19, 1990 5 APR 20, 2014 APR 20, 1991 APR 20, 1970 8 APR 22, 2021 <=== APR 22, 1953 10 APR 23, 2020* *MOST RECENT OF SEVERAL OCCURRENCES A TOTAL OF 8.50 INCHES OF PRECIPITATION FELL WHICH WAS 3.66 INCHES BELOW NORMAL AND THE DRIEST SPRING SINCE 2016. THE HEAVIEST PRECIPITATION WAS ON MARCH 28 AND 29 WHEN 1.49 INCHES WAS MEASURED. THE DRIEST SPRING WAS IN 1965 WHEN ONLY 4.23 INCHES FELL. THE WETTEST WAS IN 1983 WITH 22.55 INCHES. A TOTAL OF 0.4 INCHES OF SNOW FELL WHICH WAS 16.0 INCHES BELOW NORMAL AND THE 4TH LEAST SNOWY SPRING ON RECORD. THE HEAVIEST SNOW WAS ON APRIL 16 WHEN 0.3 INCHES FELL. THE SNOWIEST SPRING WAS IN 1993 WHEN 60.1 INCHES WAS RECORDED. THE LEAST SNOWY WAS IN 2010 WITH ONLY 0.1 INCHES. THE FOLLOWING TABLE LISTS THE LEAST SNOWY SPRINGS IN PORTLAND. LEAST SNOWFALL IN SPRING (SINCE 1882)... RANK SNOW YEAR 1 TRACE 1921 TRACE 1910 3 0.1 2010 4 0.4 2021 <=== 5 1.1 1995 6 1.3 1930 7 1.4 1927 8 1.5 2006 9 2.1 1983 10 2.8 1973 THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN SPRING 2021... DATE RECORD PREVIOUS MAR 15 21 - COLDEST HIGH TEMPERATURE 23 IN 1993 MAR 25 48 - WARMEST AVERAGE TEMPERATURE 48 IN 1953 (TIED) MAR 26 43 - WARMEST LOW TEMPERATURE 43 IN 1953 (TIED) APR 22 39 - COOLEST HIGH TEMPERATURE 40 IN 2002 MAY 26 76 - WARMEST AVERAGE TEMPERATURE 75 IN 2015 MAY 29 47 - COOLEST AVERAGE TEMPERATURE 47 IN 1968 (TIED) $$ KIMBLE